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07 Sep 2013, 06:07
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
64% (01:06) correct
36%
(01:00)
wrong
based on 693
sessions
History
Date
Time
Result
Not Attempted Yet
Matt and Jaron are constructing a brick wall. If they work together, each at his own constant rate, how many hours does it take for them to finish the wall?
(1) Matt lays 3 bricks for every 2 that Jaron lays.
(2) There are 1000 bricks in the wall.
(1) Matt lays 3 bricks for every 2 that Jaron lays.
(2) There are 1000 bricks in the wall.
07 Sep 2013, 06:21
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Matt and Jaron are constructing a brick wall. If they work together, each at his own constant rate, how many hours does it take for them to finish the wall?
(1) Matt lays 3 bricks for every 2 that Jaron lays --> the ratio of the rates is 3 to 2. Not sufficient.
(2) There are 1000 bricks in the wall. Clearly insufficient.
(1)+(2) If Matt and Jaron lay 3 and 2 bricks respectively in 1 second the answer would be 200 seconds but if Matt and Jaron lay 3 and 2 bricks respectively in 1 hour the answer would be 200 hours. Not sufficient.
Answer: E.
(1) Matt lays 3 bricks for every 2 that Jaron lays --> the ratio of the rates is 3 to 2. Not sufficient.
(2) There are 1000 bricks in the wall. Clearly insufficient.
(1)+(2) If Matt and Jaron lay 3 and 2 bricks respectively in 1 second the answer would be 200 seconds but if Matt and Jaron lay 3 and 2 bricks respectively in 1 hour the answer would be 200 hours. Not sufficient.
Answer: E.
08 Sep 2013, 17:01
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The question asks "how many hours" does it take to finish the wall?"
1) Ratio of bricks laid M:J = 3:2
Nothing here about hours.
Insufficient
2) 1000 total bricks
Nothing here about hours.
Insufficient
Together:
Ratio of bricks laid + total bricks
Still nothing about hours.
Insufficient
Answer: E
t1000
1) Ratio of bricks laid M:J = 3:2
Nothing here about hours.
Insufficient
2) 1000 total bricks
Nothing here about hours.
Insufficient
Together:
Ratio of bricks laid + total bricks
Still nothing about hours.
Insufficient
Answer: E
t1000
